package study02;

public class Java12_baozhuang_class {
    public static void main(String[] args) {
//        包装类型
        Byte b = null;
        Short s = null;
        Integer i = null;
        Long lon = null;
        Float f = null;
        Double d = null;
        Character c = null;
        Boolean bln = null;
    }
}
